128900006500

素因数分解:

$2^2\times 5^3\times {\mathrm{977}}^1\times {\mathrm{263869}}^1$

素因数の和:264865

約数の個数: 48

約数和(自身を含む): 281806827120

約数和(自身を除く): 152906820620

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 977, 1954, 3908, 4885, 9770, 19540, 24425, 48850, 97700, 122125, 244250, 263869, 488500, 527738, 1055476, 1319345, 2638690, 5277380, 6596725, 13193450, 26386900, 32983625, 65967250, 131934500, 257800013, 515600026, 1031200052, 1289000065, 2578000130, 5156000260, 6445000325, 12890000650, 25780001300, 32225001625, 64450003250, 128900006500]

約数ペア:

[(1, 128900006500), (2, 64450003250), (4, 32225001625), (5, 25780001300), (10, 12890000650), (20, 6445000325), (25, 5156000260), (50, 2578000130), (100, 1289000065), (125, 1031200052), (250, 515600026), (500, 257800013), (977, 131934500), (1954, 65967250), (3908, 32983625), (4885, 26386900), (9770, 13193450), (19540, 6596725), (24425, 5277380), (48850, 2638690), (97700, 1319345), (122125, 1055476), (244250, 527738), (263869, 488500)]